Bought a 2000 Lumina with 20K for cheap at a US gov fleet auction, and
a few days later it wouldn't start (low battery). Jumped it, and
started up fine again after a ten mile drive, but this morning battery
is low again (reading only 9 volts). I think it's the original battery
so probably six years old and ready to replace. With the car running I
was reading 13.8V at the battery but from other discussions here
several guys said 13.6 -13.8 was normal even though I always thought it
should be around 14.5, so I'm assuming the alternater is ok. Then I
discovered what a b*&!* it is to get to the battery which is hidden
under the washer fluid reservoir. Took off the support bar, loosened
the fuse box, got the reservoir out (after discovering it's held in the
front with two plastic rivets that refuse to go back in, - who designs
these things?), took off the two top screws of the metal battery
retaining bracket and then discovered it takes an extra long extension
to get to its bottom screw (who designs these things?). Got that screw
off, thinking the bracket would easily come out , but no, the air
intake assembly is in the way. Since I don't have a service manual for
this car I get anxious when I start to disassemble stuff without
knowing if I'm going to suddenly pop something and end up with pieces
that I have no idea how to put back together or that might fly apart
and end up lost in the engine compartment. The air intake assembly has
two large hose clamps on it - does anybody know which of these needs to
be loosened to be able to move the front of the air intake assembly out
of the way so I can remove the battery bracket? I'm thinking it's the
one in front of what looks like an electronic air flow regulator
assembly, but just want to make sure it won't screw anything up taking
that off. Yes, I'm ordering a shop manual. Thanks for any advice.
No, he was talking about exactly what he said. Some GM radios have a
sec. code so that if it is stolen, it won't play unless the thief finds the
sec. code to re-enter. These cars 'drop' this code when battery is removed
& no power is going to radio, & u need it to make radio play when new batt.
is installed. HTH, s
OK, thanks, just discovered the Theftlock system instructions. Not
nice if the previous owner enables that and forgets to tell the new
owner what code they picked. Apparently it wasn't enabled since the
radio still works. By the way, now that I know how to do it, I might
as well post the PROCEDURE FOR LUMINA BATTERY REMOVAL:
1. Remove three bolts (13mm) from support bar on top of washer fluid
2. Remove bolt/screws/plastic rivets that hold the washer fluid
reservoir and remove reservoir, disconnecting electrical pump from the
reservoir if necessary, and being careful that the remote positive
terminal on the adjacent fuse box is covered with something (like duct
tape) if the original cover is missing, to prevent accidental shorting.
3. Disconnect the battery negative post (8mm) and battery positive post
(8mm) being careful that the post bolts don't fall out in the process,
and making sure the radio Theftlock code is known or hasn't been
enabled (see owner's manual)
4. Remove screws/bolts from the metal battery retaining bracket - the
13mm bolt on the bottom requires a very long socket extension.
5. Remove the nuts from the fuse box that was previously mentioned
adjacent to the rear of the washer fluid reservoir, so that the fuse
box can be moved and secured out of the way.
6. Carefully move the positive battery cable out of the way, which is
essential, and should enable you, with much wiggling and maneuvering,
to eventually get the battery retaining bracket out by moving the
bottom of the bracket toward the front of the vehicle - note that there
is a cup on the retaining bracket that supports but isn't attached to
the air intake assembly, which cup support is what makes removing this
bracket so difficult. If all else fails, loosen and move the front
part of the air intake assembly out of the way, but this shouldn't be
necessary if you're persistent.
7. Lift battery out at an angle - it won't come out straight up.
8. Curse the GM idiot that devised this insane state of affairs.
9. Install new battery and other hardware by reversing these steps,
being sure to repeat step 8.
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